The following group codes apply to trace entities.
Trace group codes
Group code
Description
100
Subclass marker (AcDbTrace)
10
First corner (in OCS)
DXF: X value; APP: 3D point
20, 30
DXF: Y and Z values of first corner (in OCS)
11
Second corner (in OCS)
21, 31
DXF: Y and Z values of second corner (in OCS)
12
Third corner (in OCS)
22, 32
DXF: Y and Z values of third corner (in OCS)
13
Fourth corner (in OCS)
23, 33
DXF: Y and Z values of fourth corner (in OCS)
39
Thickness (optional; default = 0)
210
Extrusion direction (optional; default = 0, 0, 1)
DXF: X value; APP: 3D vector
220, 230
DXF: Y and Z values of extrusion direction (optional)